Haystacker



July 17, 1923. Re? 15,658 J. H. COPE HAYSTACKER Original Filed Feb. 27 1920 2 Sheets-Sheet l Q Q Jsqub h. Cape.

attorney July 17, 1923.

J. coPE HAYSTACKER 2 Sheets-Sheet 2 Original Filed Feb. 27, 1920 grwentoz L [a Jsepb J1. Cope.

a n z m a Reis sued July 17, 1923.

Y )UMTE STATES. ATENT OFFICE-1 MJ'OSEIPH'H; corner DENVER, coLoRano, AssIGNoR To THE wmns'onmanurncrua 11m company, orwmnsoa; coLoRAn jA.coaroRA'rIoN or COLORADO,

HAYSTACKER.

Original No. 1,426,961, dated August 22,1922, Serial No, 361,833, filed February 27, 1920. Application for 1 1 reissue ,filed Apri1'26, 1923. SeriaI No. 634,859;- I

To all tv/zom it may) concern:

I Be it known that I, JosEPH H. Corn, :1 citizen of the United States, residingat the city andcounty of Denver, State'of Colorado,

j I arms are slidable upon the lifting arms and 25 have invented certain-new and useful .Im-

provements inl Haystaokers; and I do dev upon this beam, the opposite ends of the clare the. following to'be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and usethe same, reference being had to the accompanying draw- I v ings, and to the characters of [reference marked therejomwhich form a part of this.

specification.

The object of this for the ,purpose stated.

Briefly, the invention comprises a ground frame provided with upstanding standards directly above the longitudinally extending.

timbers of the ground frame. The extension are adapted to be extended by means of twopart jointed links. The forward end of one of the link parts on each side of thedevice is adapted to'be pivoted on, the extension arm at anyone of a plurality of points, ac cording to the amount of extension desired. The rear "end of the other part of each link is pivoted tojthe rear of the framework, and this part extends. through a stop device which extends upwardly, the lower end "thereof being mounted either. on the pivotfor the corresponding lifting arm, or on a pivot on the framework at some point adjaoentthe said lifting arm pivot. Lifting "means for elevating the stacker head are provided in the form of an A-frame, connected'wi-th the ground frame, rods connectedflwith the ground: frame rods connected with the upperend of the A-frame, and with the lifting arms, an elevating the same;

In the drawing: .Fig.,1ii s aplan' of-the invention.

d block and tackle for Fig.1'2l' is .a side elevation showing the dc vice in: lowered position and Fig; 3 is asideelevat onshowing'the de:

invention is to provide aniefiicient and cheaply constructed {lGVlQB vice extended almost to the limit of eleva and the abutting ends of truss bars 16 rest it truss bars bearing upon the tops. of the tim bers 10. Short, upright standards or posts 18 are secured to the sides of each of the tim-i bers and the adjacent truss bars 16, the ends of thebeam 14 projecting through these posts,as indicated in. 2. At 20 the lift-U. mg arms 22 are. pivotally mounted between the upper ends of the posts 18, so that these arms 22' lie dir ectly'above the timbers 10v and i i the adjacent trussbars 16. Extension arms 24 are slidably mounted upon the lifting arms 22 and retained in such relation by means of suitable guides 26. The extension arms-24 are provided with a plurality'of holes 28,- in any one of which a pin may be positioned forthe purpose of pivotingthe forward ends of the forward sections 1320f J I pivoted at 33 to the rear. sections 34 of the:

the extensionlinks; The sections 32 are links. Each section :34 has its upper endin theform of a tongue/35, carrying a trans versepin36 to serve-as a stop for the adjaT tion 34 isforked as indicated at 38, in order to straddle the truss bar 16 therebeneathi. .to

which it is pivoted at 40. Each section 34 carriesa transverse pin -42. as indicated in Fig.2, for the purpose of holding in 'ele;

vated' position the arms 44 of astop element,

which carries at-its upper end-a stop block 46, against whichthe section 34 bears when the stacker is in elevated position;

Thef I for receiving a removable pin 50,;which is adjustable. with the links 32, 34, according tot-he amount of extension desired; This pin 50 isto'engage the forward face of the;

section 34 to limit its forwardmovement as f v a 'the head descends in order to assure com plete retract-ion of the extension arms 24.

cent section 32.. The lower end of each sec- 33 arms 22- as indicated-at 66.. The upper end of the frame 60 also carries a'pulley 68; and an eye 70. The rear end of the framework carries a pair .ofpulleys 72, -and-over these parts a cable'74 is threadedifor"operating the A-fra'me 60 and the lifting rods 64.

Each of the lifting arms 22 has a spring 80 connected thereto at 82, the opposite end of=the--spring beingprovided with a' hook 84, which engages a crossbar :86, adap-ted to slide in slots 88 in the upper sides of the lifting arms 22. Blocks- 90,"secured to the inner sides of the inner arms of the link sections-32 project down intoposition to engage withthe'rear edge ofthe'ba'r 86y in order to advance saidbar '86: inthe slots"88 on the-upper ends of 'the stoparmsl. As-

elevation continues, the "link sections "32 thereby to the extension'arms 24 through the and tension the springs 80 when the arms 24Eare :extended. i 1

1n the operation '.'0f 1 the device, "the 7 stop arms 44 bear upon-the transverse pins "42 of p the sections 34 in order to retain said arms in'the position shown. 'Iheforward ends of the sections 32 are set: in one o'fthe holes 28; to give the extension required; and -t'he pins 50*are set-accordingly f As the lifting arms 22 'areelevated through the medium of the 'A frame and the rod '64, the sections '34 move rearward through the medium'of"thesections 32*u'nti1 said sections 34 engage "with-the blocks 46 cause the extension arms '24 fto slide outwardly upon the liftingarms 22,-since movement of the sections 34 is prevented by the blocks 46. During this movementthe blocks 90 on the link sections 32"come into enga'ge ment with thetransverse bar86 and during the latter part of the extension of the arms 24 this bar 86 places'the springs'80'under v tension so that when the stacker head has passed over the deadcenter, at piv0t"20,' the springs 80 are under considerable tension, which isftransmitted by means of the ba'r 86 and the blocks 90 to the links 32, and

pins '30. Thus, after the load ha's been' thrown from the'stacker head 25 and draft j on the cable 74: is released 'fthe springs8O will cause the"arms 24 and head 25 'to be "drawn back over the dead center at "20, whereupon the weight of the head willc'ause the same to descend. f The transverse'pins 36 in the upper ends serve as'stops for the link-sections 32 when rearmost' position. "By this means"; doubling back of the link "sections 32 'and "3'46 about thepivotpoints 33 is'prevented. I I

It willbe noted "p articularly that" the c'o11- .cgreater extent than necessary.

" the lifting arm comprising a' jointed link havingtwo members pivoted togthenpnc of which is e meate the main 'frameand I the other to' 'the' extension arm ;'-and means, of the tongues 35 of thedink section'st i,

I struction here disclosed with reference to the link sections 32 and 34 and the stop arms 44; and stop blocks 46, is novel. Also, the piv oting of the lifting arms 22 directly above the ti-mbers-lOis novel. v

VVhen the lifting armpa'sses the" dead center with a heavy load of hay on the stackerhead, there is naturally] considerable momentum in themovingaparts and this tends to carry the parts beyond the vertical to a sive movement of the stackerhead is positively prevented byi'the factthat t l ieztrans- 'verse'bar 86cwi1l-engage the upper ends of the slots 88 and form a positive stop which causes the member- 32tofunction as a brace in the manner clearly apparent from Fig. When the links function tO 'XfiBnd the extension arm, the force exerted hy the inember 32 will "operate in:a direction in'cli ned at 1 anangle to the arm:'24'-a'nd there will consequently be a "resultant forcewhich tends to hold the extension": arm "against the lifting arm and thereby to keepthem'parallel.

'I claim: I

1. In "a stacker ;':a. main frame; 'a -sli bab'le extension arm; astackr head on said: arm;

means to-lift saidarm and head and means for extending said arm comprising a jointed link having 'two members pivoted together, one of which isfpivot'ed tonthe frame antlthe other is pivoted to the-'extension arm. 7

2. In a stacker a mainframe asli dable extension'arm a stacker h'ead on'sa id arm;

means'to lift' said 'arm' and head a jointed link for extending said arm comprising" two members pivoted together, oneof whichis pivoted to the frame and the'otheris pivoted to the extension arm and =means to li-amt both forward and rear'ward:movement of,

that link-member which is pivotec'l to the frame. Y f

. 3. In a stacker; a'm'a'i n frame fa lifting arm; an extension arm slida ble "'on said lifting arm; means to liftsaid arms and head ;i'

and means to-slidesaid extension arm- 0a Such excesthe lifting arm comprising a joi'nted 'llnk 'havin'g' two'members pivoted together, one

of which is pivoted to" the main frame-arid the other to the cx'te'nsionarm. Y

4:. In'a stacker; amain frame;al'i'ft'in'g arm; anfextension arm"slidable5on= said lift 'ing arm; means to' lift said arms-anddieaid;

and means to slide *said extension arm on to limit both forward and rearward*move-- to the frame. I s I v 5. In a stacker;a*main frameya lifting ment of that'link member-whichis pivoted the stacker headis at "itsupp'ermcst'and arm; an ektension.iarmslfdablepn said-lifting arm; means to' 11ftsaid"armsandhea'd and means to slide said "fixtension 'arm on the lifting arm comprising a jointed link having two members'pivoted together, one of which is pivoted to the main frame and the other to the extension arm; and a spring pull-back adapted to beplaced under tension as said lifting arm approachesits limit of movement. a w i it a 6. In'a stacker; a main frame; a lifting arm; an extension arm slidable on said liftingalrn; means to lift said arm and head; ajointed link comprlsing two members pivoted together, one of which is pivoted tov ivoted at the rear of the, pivot of said 'fting arm; a second link memberpivoted 3:

to the first mentioned member and pivoted also to said extension arm; a stacker head on said extension-arm; meanst'to lift said arms'andhead; and a spring p'ull-back adapted to be placed under tension as said,

the main frame and the other to the exten- I sion arm; aspring pull-back adapted to be placed under tension as said lifting; arm approaches itslimi't of movement,--sa1d pnllback comprising means slidableonsaid lifting arm; a spring connecting said means with said liftingarm; and a deviceon sald link to engage said means to extend the same. a V 1 7. In a stacker; a main frame; a slidable extension arm thereon; a stacker head on the arm; means to lift the arm and head;

and means for extending said arm as it is lifted comprising a jointed link pivoted to the arm and to theframe.

8. In a stacker; a main frame; a lifting arm; an" extension arm slidable on said lifting arm; a stacker head on said extensionarm; means to lift said arms and head; and

means for sliding the extension arm on the lifting arm comprising a jointed link pivoted to the extension arm and to the frame.

9. Ina stacker; a main frame; an extension arm having a stacker head thereon; means to lift said armland head; a'joint'ed link for extending said arm as it'islifted comprising two members, one member being pivoted to the main frame and the other to the extension arm and means to limit the rearward movementof said link members.

10. In a stacker; a main frame; an extension arm having a stacker head thereon;

means tolift said arm and head; a jointed link for extending said arm as-it is lifted comprising two members pivoted together,

ment of said link members, said limiting means comprising 'a guide and a stop on lifting arm approaches its limit of movement,

v13. In a stacker; a main frame; a lifting arm pivoted to the frame; an extension arm slidable on said lifting arm; a link member pivoted in the rear of the pivot of said liftin arm;'asecond link member pivoted to the first mentioned link member and pivoted also to said exte-nsionarm; a stacker head on saidextension arm; means to lift said arms and head; means to limit both forward andfl rea'rward movement of that link'mem-f her which is pivoted to the frame; and a spring pullback adapted to, be placed under tension as said'liftingarm approaches its 1 limit of movement. i

14. In a stacker; a main frame; a lifting arm pivoted on the frame; an extension arm slidable on the lifting arm; a link member pivoted on the frame; a second link member pivoted to the first. mentioned member and pivoted also to said extension arm; a stacker tioned link member being adapted to engage load.

head on said extension arm; and means to lift said armsand head; a stop member for said link, the upper portionof the first men:

said stop member when the stacker is in elevated position, and the pivot point of the second member on the extension arm being adapted to lie forward of the center line of said first member when in said position, to prevent collapse 15. In a stacker; a main frame; a lifting arm pivoted on the frame; an extension arm slidable on the lifting arm; a link member pivoted on the frame; a second link mem- '1 her pivoted to-the first mentioned member and pivoted also to said extension arm; a

of said members under i stacker head on saidextension arm; and 1 means .to lift said arms and head, the upper.

part ofthe first mentioned link. member being adapted to; belretained in position when said stacker is elevatedto prevent'collaps'e of said link members under load. I

16. In a stacker; a main frame; a lifting arm pivoted on the frame; an extension arm said guide for engagement} by the link. 12. Ina stacker; a main frame; a lifting arm pivoted to the frame; an extension arm slidable on said liftingarm; a link member slida-ble on the lifting arm; a link member pivotedon the frame; a second link member pivotedto the'first-mentioned member and pivotedalsoto' said extension arm; a stacker head on'sai'd extension arm means to lift said arms and head; and a'stop to be engaged by the upper part of thefirst men-l tioned link member to retain the latter in position when said stacker is elevated to prevendt collapse of said linkmembers nnder loa 17. In a sta'cker; a'ma'in framepa lifting arm;pivotediithereto an extension: arm slidable ion the lifting arm; a l'ink 'member pivoted on the. frame a second link member pivoted torthefirst mentioned member and pivoted also to said extension arm; a stacker. head on said: extension-arm means to lift-said arms and head ;:a= stop'eonnected with the frame and adapted to be engaged by the upper ':part of the izfirstz mentioned linkr member to limit the. movement thereof.

:18. "In astaeker; .azmain "frame comprising: a post ;.;al ilongitudinallyextending timher; spaced nmembers connected with the upper portion of saidzpostaridzwith said timber braces on1the sides- .of the r timber; a: lifting arm ;:"an' extension farm slidable on said liftingnarm; :a "link connected at one end to said extensionsarmsand having the otheivend extending'between-zand guided by said spaced; amembers, .the' lifting arm ibe-ing positioned "directly zabove said timber with connected-at one "end to said frame :and at its other'end to the'firstnamed link member. said second member extending between and -.guided by said spaced guides.

:21. In: astaeker; .a lifting: arm;an.:extension-iarm; a two-part jointed link to ex tend v' the extension-larmya-nd a stop to be engaged by one: part of said link. to; limit rearward motion.

.22. In astaeker; a lifting ar-m ;r.anrextension arm; .a ointed linktOl extend? the :ex tension=arm ;.---an'd azstop to be engaged by said link to limit rearward imotion one end -ofthe link: being pivoted to the-extension arm :and: the other :endto the. frame.

23. In a 'stacker;.-.a frame including a ground timber a pivoted lifting armdying over said timber; an extension-armslidable onsaidlifting arm ;-;means tolift saidarms;

and: means to extend said extension arm .as saidarms are belng 11fted,sa1d extension means izcomprising :ajointed .linkeonneoted with the: frame andwith the extension arm.

. 24. In .a i stacker; :a :frame 1 including a a;

ground; timber; a. post-zsecured ;t02 said itimber a. lifting arm lying g'g over said J timber and pivoted to: said: post an extension. .arm slidable ;onsaid, lifting arm ;:.-meanstto lift said arms: and means to extend said extenotal ly mounted.

sion arm whilelt-he a arms :are being lifted, said extending-means comprising a twoep art jointed linkconnected with the extension arm.

I 253111 a stacker; a frame includingea ground timber; *aipOSU-SBQUIGCl at" the side of said timber; a lifting arm lying idireotly above'said timberzandi pivoted: to said post; an extension mm slidableon saidlifting arm; means t lift; said arms; and means to extend said extension armwhile' theiarms are 'being lifted, said =extending Lmeans' comprising ajointed link having one partpivoted to the "extension .arm and-anotherr part pivoted." to the: frame.

'26. In la '=istacker; a frame including; a ground timber arpost=secured atthe side of said timber; :-:a' lifting arm :lying directly above said timber'. and; pivoted to said-post an r extension 1 arm I slidable on said lifting arm; means to lift said arms; means toiextend said-extensionrarm while the arms are being lifted, said extending means comprising a jointed link having ne part pivoted to the extensionarmzand another-part pivoted to: the frame; and a stop. for limiting the rearwardmovement of -said link.

27. Inr-a :stacker;.:a liftingaarm; an extension :arm; and'meansecomprising1a twopart j ointed link to aexten d the extension arm.

:28. in ":a" stacker a lifting :arm an extension arm and:-means comprising a twopart :jointed link-to :exten'dthe extension arm, said jointed'link being pivotally mounted. I

.29.'In a staeker; :a-lifting arm; an extension arm;= .a two-part jointedl-inkt-to :extend the e'extensionsarm; and a stop; to be engaged: by'foneypart-of said link to limit motion.

30. In i a stacker; 1 a. lifting arm; an extensionv arm; a two-part-jointed link to extendthe'extension arm and a stop to be engagedby-cnepart-0f said link to limit/motion, said jointed link being pivotally mounted.

.31. zIna stacker; aamain 1 frame ;-=-a.-1slidable extension arm a? stacker .head: on said arm; :means to liftsaidnrnr and :head; and a jointed link-Ito extend the-ex=tension arm comprising two relatively movable. connected members.

32. Ina. stacker a :main frame av slidable extension-armaa stacker head on=said :army means to lift -said warm --and :head; and a jointed link to extend the extension arm comprising, two relatively; movable connected -.members, .said jointed EllIl'k -,being piv- -33.; 1}naa;stacker yargmain. frame ;:a: slidable extension-*1 arm iaestackerahead. on saidwarm means to liftesaidiarm andthead; :and: a j ointe'd. link-comprising jtwo members, one of said members being adaptedto becpivotadapted tobe engaged by the other member I of said link to. limit motion thereof.

35. In a stacker; a main frame; a slidable extension arm; a stacker head on said arm; means to lift said arm and head; and a ointed link comprising two members,

one of said members being' connected with the extension arm and bodily respect to said frame.

36. A stacker comprising, in combination,

a ground timber; a pivotedlifting arm lying directly above said timber; a pair of spaced upwardly projecting post members provided with a pivot pin near their tops for. cooperating with the lifting arm; an extension armslidable on said lifting arm; and means comprising a two-partjointed link for slidingsaidextension arm on the lifting arm as the latter is moved aboutits pivot."

37. In a'stacker; a-frame; a backstop; a two-part extension link, one part of which is adapted to'engage said stop; a lifting arm with which the other part of .the link is connected, said arm being pivoted to the frame forward of the stop.

'38. In a stacker; a frame; a backstop;

movable with a two-part extension link, ne part of which is adapted' to engage said stop; a lifting arm with Whichthe other part of the link is operatively connected, said arm being piv- "oted to the. frame forward ,of the stop,

whereby said link, when engaged with said stop constitutes'a brace for the elevated portions. fj i 39. In a stackerfamain frame having' a ground timber; a lifting arm thereon; an extensionarm on the lifting arm; and an inclined two part link connected with the extension arm, the rear end of' the lifting arm being pivoted'on the frame, at a point elevated from theground timber so asto cause the lifting arm to incline downward as it extends forward, whereby-the link is nearer in line with the lifting arm.

Inastacker; a. main frame having substantiallyparallel sides; a liftingframe having parallel ari is-on said framega pair of spaced braces secured to "each of said frame sides, the ends of the lifting arms lying .over the sides'of theframe and piv- "oted between 'said braces."

41. In a stacker; a lifting arm;an extension arm; atwo-part jointed link to extend the extension arm; a stop to be engaged by one part of said link to limit rearward movement thereof; and means at said joint to limit swinging of the other part about the joint to prevent doubling back at the oint.

42. In a stacker; a frame; a lifting arm;

an extension arm; a two-part jointed link to extend the extension arm; a stop to be engaged by one part of the link to limit, rearward movement thereof, one part of the link having a portion extending beyond said joint; and means on saidextending portion to engage the other part of the link and prevent doubling back at said joint.

43. In a stacker; a main frame; a lifting arm pivot-ally secured thereto; an extension arm slidable on the lifting arm; means to lift said arms; and means to extend said extension arm as said arms are'being lifted, said extension means comprising a jointed li1ik,'one part of which is pivotally conne ted to said frame at a point located in the rear of the point where the lifting arm is pivoted, another part of said link being connected to the extension arm.

44. A main frame; a lifting arm pivotally connected to the main frame at. a point intermediate the ends thereof; an'extension arm slidably connected thereto;means for lifting said arms; means for sliding the extenan extension arm slidable on said lifting arm; means to lift said arms; means to extend said extension arrnwhilethe arms are being lifted, said extending means comprising a jointed link having one part connected to the extension arm and anotherpart connected to the frame at a: point to the rear of the pivot of the lift-ing arm.

46.1n a stacker in combination, a main frame; a lifting arm connected thereto at a point intermediate the ends'thereof; an extension arm slidable on said lift-ing arm;

means to lift said arms; means to extend said extension arm while the arms are being lifted, said last named means comprising a jointed link connected'to saidextension arm and to the frame; spring means adapted to be put under tension bythe link as the lifting arm approaches and-passes the vertical osition, whereby a force. is produced. tending to return the arm. '47. In astacker in combination, a main frame including a ground-timber; a post secured to the said :timber :atwa point spaced from the rear lend thereof; 21';1lfi /i11g:;1I111"lJlV otalily connected to the post; extension armsl-idable; on: [said diftingyarni .meansto lift said iarmsl; wmeans to: entend said: extension arm awhile the arinsare being; lifted; said last named means comprising a twopart ij ointed link connected w ith said frame and said .extensioniarm; a springsecured to saidslifting arm; and ineanscarriedilby'onc partof saidilink forytensioning said springas :the arms approach-their final elevated 'positiona 484111 a: stacker in combinatioma main frame; includin-ga groundatimber; ai-pos-t secured to the-said. timber-at impointspaced fromtherear end thereof; auliftingarm pivotal'ly' connected to the post; anzzextension armv =sli-dable; on said lifting :arnm; meansto lift said 3 arms; .means to extendsaid last named extension-1 arm, said means comprising; a two-part jointed dink COlll'lQttQCl-wWltll Sillflflfi'lllfi and saidextension arm '111' such manner that the lifting frame-can passabe yond the vertical position iL' SpliIlgT secured to said lifting arm; and 'me ans carried by one part of said'linlc for 'tensioningi said springpas. tliearms approach; their finalelevated position; whereby a=.force-- will beapro; ducedctending; to return-the: arms.-

49. In a stacker"insicombination, aamain frameincludingiawground timber; :a postsecured to'thevsaiad timber? at a point for Wardly .of the rearend thereof; a 'lifting arin pivoted'zto the post; an: extension arm slide ableuonssaid, lifting arm; means-to lift'said arms; means "too-extend, said extensiongarm, said means comprising a jointed link COIIlZ-r posed of twoparts; one o f 'saidwpartsabeing pivotallyconnected 'tO- t'hB extension-arm; the

other: part: being. pivot-ally "connected. kto .xthe frame ateaapoinutoztheqrearsof said post, whereby the e liftingzarrm mayzswingl spastwthe vertical position"; a'spring secured tozthe lift in'g arms; means carried byxthe link connect-1 'ed to the extension 1 arm: for tensioninga:v the spring aswthearms approach; andr-passthe vertical:positiomuwhereby a: force is -prodnced which tends to return the arms to their normal position; and guides cooperatingwithwthe portion of the= jointed link whichais connected to the "main frame:

50.111v a' stacker, a: main frame; a liftingarm; connected thereto; ,means for lifting:

said-arm; resilient; means for producing-a;

force tending'rto return the lifting; arm to normal position; and firrtWOrPflItjOlIltQdfllflki for: tensioning said=resiliente means 38:.th8 arm approaches wits-raised positiom 51. A stacker adapted: to permit, the stacker-head;- to move: beyond the: vertical 5 sitionycomprisingt :incombination, a" main; rame; a lifting arm; pivotally; connected? thereto; an .jextensionwarm movably connectedato the lifting arm; a stacker-head on: the

extension arm; ;meansr=fon cliftingiqsaid;farms;- andehead; ifiutWOrP art permanently connect-5 ed; link-aoperativelyy connected; between th'e main iframevand, the :extension; arm; for ex? tending, the same asitislif'ted; a'ndmesilient means for return-saidflarms; p

52.: Ina stacker; aemain frame; a=.1i-fting-;

arm pivotallyconnected :thereto; :ani extem sion arm: -movably connected to the lifting; arm; .means-forlifting said arms; an :exe. tending device comprising; two. movably= connectedw parts operatively; connected, With the main-frame andthellifti'ngarm; saididee vice: being;;also operativelyconnected with the vextensiom armtot-extend the. same as the arms are being lifted and means :COIHPI'dS'z, ing a i spring;;-adaptedntoabe put under tens; sion by the: extending device as the lifting; arm approaches-mi e:end1.of= itsstrelm;:where by a force is produced tending-,tmreturnsthe' arms;

53. ,In a; stacker; an maine frame; m; lift-i. ing arm attachedfithereto ;--2L]Sl'iBXtBIlSiOIL';.aII1l3 movably: connected-v Withthe lifting; arm;

means for: lifting 'saidiarms a; device. having two: movahly: connected; parts operatively connected: with; Nth/3i emain frame 1 and with the extension arm .thakportionof thev device connected with z the extensiom arm; pivoting; around the-extension= armi 1connectlon as a center as the arms are raisedQv 54;! In; aestacker armairr frame a; lifting arm attached; thereta; any; extension,- arm-i movabl-y; connected toathe; lifting; arm; means; for fllftil'lg'gsaidm arms; .adevice having two =movablygconnected parts,,.said-!deT vice being pivotallyconnected with, the framei-and pivotalljhconneeted. awith ,the extensionaarm; that rportioniofthe -deviceiconqnected; Wlth: the a extensiemarmswinging: around said pivot assaa centee ass the 1 arms?! aretraisedc 55-. Inia stackerethatwwill, permit-:the head; to 1 be carried beyonda-nvertioal position I and Will-1 continue to: extend aftem passing; this..- point, comprising, in combination, a main-\- frame-;1. a lifting; arm pivotally connected thereto; an extension: arm movably connected, to the :lifting arm; ahead on the en.

tension: arm; means for: lifting; said: arms andlreadl; a: v device whaving two connected. parts-I cooperativelx connected; to the maina frame and ;With'-.the-.-extension arm; the =-pom tionof the device (connected .;With the; extensions arm adapted" to? swing}; around that. pivot assarcenterz.

56; In a stacker thatiwill permitthe head to be carried beyond; a verticalr position; and 1 W111 contlnue wto extend, after passing thisa pplnt, compmsmg, 1n =comb1nat1on; a main.

frame; a; lifting; arm..- pivotallv; connected; thereto; an extension: arm; movablgv; cone nected to the liftingarm; aaheaduon-i-the exe,-

tension arm; means: for lifting; said arms producing; a'lforce tending; rtoqi andi head; a device having movably con- 7 nected parts operatively connected to' the main frame and lifting arms and also con= nected to :the extension a rm and means for maintaining the l fting and extension arms parallelwhile they are being lifted.-

57 In a stacker having a main frame; a

i lifting arm*pivo'tallyconnected thereto; an

tending said extension arm and for produc "ing a resultant force which tends to hold the arm isbeing-lifted;

down the rear end of the extension arm as 58.111 a-stacker;fa main frame a lifting arm connected thereto; an extension arm movably connected with the lifting arm; a stacker-head on the extension arm; means for lifting said arms and head; a device comprising two movable parts for extending said extension arm as itisj elevated; and

means for holding the :extension 'arm and lifting arm paralleliwith each other during the lifting operation.-

the stacker-headto be carried up "to and beyond 'a pointvertical with the lifting arm.

pivots and will continue to extend the extension arm and "head after passing said point comprisinga, main frame;- a lifting arm operatively 'connectedthereto; an excontinue toextend after passing said ve'rtifcaljposition; the. combination of a main frame; aflifting arm connected thereto; an extension arm movable on the lifting arm;

tension arm movablvconnected with the lifting arm; ahead on the extensionarm; a

device comprising two movable parts operatively connected "with the main frame and.

extension arm fo yxte di-ng the arm as it is being elevated and means' to keep the lifting'and extension arms parallel-onewith the other d-nringthe lifting operation.

"60; Anextension stacker that will permit v the head to be carriedbeyond a vertical po sition and "continue to extend after passing lifting: arm: a head on' the extension arm; means for lifting the arms and head adapted to carry the arms and headbeyond said .vertical' position; a device comprising two movable connectedparts for extending said extension arm as it is elevated; and means i for holding the extension .arm and the lifti 'ing arm parallel to each other 'during'the lifting operation.

61. Ina stacker that will permit the head to' be carried beyond a vertical position and ahead on the extension arm means for lifting the arms and head adapted to carry the varmsand head beyond said vertical position; a device comprising two movable parts parallel as they are lifted.

permanently connected parts frame for limiting for extending said extension arm head as they are elevated; and means for holding the extension arm andthe' liftingarm parallel to each other during the lifting operationfsaid" movablv connected parts being movably connected with the main frame and the extension arm. r

62. In a'istacker; a' main frame; a lifting arm pivotally connected'thereto; an exten.-".

sion arm slidable on the liftingarm;'a twopart link connected to the frame and to the liftingarm will be limited in one direction.

63., In a stacker; a mam frame; a lifting arm connected thereto; means for lifting l said' arm; bracing. means comprising a :tW0-part' omtedl1nk.

640111 astacker'; a main frame a lifting arm connected thereto; means for lifting said arm; and bracing means comprising.

'one' part of;a*tWo-.part jointed link. j 65. In'a' stacker"; a main frame; a lifting arm pivotally connectedthereto; means to 59. An extension stacker that will permit lift said arm; a two-part link operatively connected to the frame and the lifting arm;

means comprising'a stop carried by the lift ing arm for limiting the rearward motion thereof as it reaches the limit. of its movement. it v a j a.

66. In a stacker; a'main frame; a: lifting armfpi-votally connected thereto; meansto means for maintaining the lifting and ex tension arms parallel as they are lifted,

67 In a "sta'cker;--a main frame; a lifting arm pivotally connected thereto; an extensionarmonthe lifting arm; means for lifting said arms; a stop mechanism comprisingtwo movable connected parts operativel y connected Ybetween: said "lifting arm i and main frame for limitingthe rearward movement of the lifting arm J and means for maintaining the lifting and extension arms '68. In a stacker; a'mainframe; alifting arm pivotally connected thereto at: a point above thegronnd and forwardly' 'of'the rear end thereof; an extensionjarm 'onfthe lifting arm; means for lifting said arms; and a stop mechanism comprising two movable operatively connected to said lifting arm and main the rearward" movement of the lifting arm.

69.111 astacker; a main frame;a lifting arm pivoted thereto; meansfor lifting said arm; a link op'eratively connected with the main frame and the lifting arm, said link comprising two relatively movable connected parts astop located in the -path of; one of said parts to limit: the movement thereof in one direction 1 and? cause the link; to function as a brace for the liftingarm;

70. In a stacker;'a main frame; 'a lifting armpivotally connected 'thereto; extension arm slidably connected to the liftingarm; a linkcomprisingtwo partsconnect-ed together, pivotally connected to the \main frame and operati'vely connected to the ligfit; ing arm said link being'also connected-i to the extensionarm for-extending the same; means for lifting the said arms; and means comprising saidlink for limiting the move ment of the lifting arm after it has passed the vertical position.

71. In astacker; a, main ;frame; a lifting arm connected-thereto an extension anmfon the'lifting arm; a stacker-head carriedby the extension arm; means forlifting said arms and head; a device. connected with the, main frame and the extension arm to extend said. extension arm as the-arms are be ing lifted, said device comprising two relatively movable connected parts one of the members of the stacker having a striking point located inthe pathof one of saidpar'ts to limit the movement of said armsin one direction and cause the device to function as av brace for said arms.

72. In a stacker; a main frame; a lijiting arm thereon; an extension armon'the lifting arm; a stacker-head on the extension arm; means to lift said arms and head}; means to extend saidextension armasthe same is beinglifted and; to form a brace, for said arms when said arms reach the limit of their movement, said means including two relatively movable parts permanently connected. together and pivotally connected; to said frame and extfension arm.

7 3. In a stacker; a main, frame; a lifting arm attached thereto; an extension arm-n movably connectedwith the lifting arm;

' means to lift. arms; a link vmember open atively connected to the ma1nframe;a Sec-.r

0nd link member, operatively connected: to the extension arm, the-two linlc members being operatively connected together insuch a manner as to permit of various adjust-p ments being made for, varying-the degree'of extension-of the extension arms assaid arms are being hfted.

74;. In a stacker wherein\ the head can be carried beyond a =pointver,t-:ieal;of the pivot point of'the liftinga -m, comprising a main frame; a lining: arm pivoted thereto; an extension arm on 'thelifting arm; ahead on; the; extension armymeans toliiit said arms; a device connected with the] main frameand the extensionaBm-to extend the extension; arm as it is being: lit-ted; said device comprising two relative movable connected-parts; and; means to keepthelifting 1 arm andextension;arm'vparallel with each other during the lifting operation,

75. In asftckei a main frame -adapted to rest upon the ground; a lifting arm pivotally connected thereto at ay point' forward l-y of the rear ends thereof; an extension slidable onthe lifting arm; means for lifting said arms and a device comprising two; movable connected parts for-extending the extension arm as the arms are-being raised during the lifting: movementp I Ina stacker; amam-trame adaptedto and-means formaintaining the arm parallel 1'6. rest upon the ground; a lifting arm pivotall connected thereto, at a point above the same; an extension ar-mslidable onthe lifting arm; means for lifting-said arms; a device comprising-two movable" connected" parts "for extendrng;theextenslon arm as;

the arms are being raised; and means for maintaining the arms lifting movement.

p ar-allel during thebers beingto the rear of the lifting arm.

when the latter is at the limit Ward .,movement; i

'In Witness whereofI alfix', my: signature JOSEPH; H. core.

of its. ups,

1 1!. In a stacker; a mainframeaadapted to" 

